Tomato Bud Blight, also known as abnormal stem, window gap and glasses, is a common physiological disease of Tomato in protected areas in summer and autumn.

1、 Symptoms: it usually occurs on the main stem near the third and fourth spikelets. There is a groove on the stem. When it is serious, the groove cracks and turns brown, and even cracks into a hole. The diseased part was cut open, and the light medullary center turned white and brown; The inside of the heavy crack turns brown. The flowers and panicles above the disease stop growing, a large number of flowers fall and do not set fruit.

Bud Blight

Bud Blight

2、 Etiology: high temperature, dryness, more fertilizer, more potassium, more ammonia and soil pH discomfort cause obstacles to the absorption of boron by tomato and the uncoordinated operation of boron in tomato. Too strict water control after planting and too high temperature at noon in growth period are easy to occur.

3、 Preventive measures:

During seedling raising, boron fertilizer shall be sprayed more than twice. The seedlings shall be raised with substrate to strictly prevent high temperature and drying during the seedling raising period.

Attention shall be paid to avoid high temperature after planting and growth period, and the shed temperature shall not exceed 35 ℃

Squatting seedlings shall not be excessive, and drying shall be avoided during the growth period.

Pay attention to the reasonable combination of nitrogen, phosphorus and potassium in tomato base fertilizer, and avoid more nitrogen and potassium.

After planting, boron fertilizer or other liquid fertilizer containing boron can be sprayed, such as 600-800 times liquid of gaomeishi.

If the disease occurs on the main stem, the upper lateral branches can be left to continue to grow instead of the main branches.

In Article 5 of the technical service, there is a map of tomato diseases and insect pests. The picture of Bud Blight in the map was taken by our company in Harbin Industrial and rural areas in the autumn of 2011. "The above remarks are for reference only!

Xi'an Jinpeng seedling Co., Ltd